TWM638688U - RFID tag position determination system - Google Patents

Abstract

A radio frequency tag position determination system includes a plurality of radio frequency tags, a radio frequency tag reading module, a local computing and storage device, a cloud server and a cloud database. The radio frequency tag reading module includes a reader, at least one antenna electrically connected to the reader, and a transmitting power regulator. The reader receives reading data transmitted by a plurality of radio frequency tags. The local computing and storage device includes a processing unit and a local database electrically connected to the processing unit. The local database stores record data of multiple objects. The processing unit compares the read data with the recorded data in the local database, adjusts the transmitting power of the electromagnetic wave of the antenna according to the comparison result, and sends the comparison result to the cloud server.

Description

RFID tag position determination system

This creation is related to the technical field of reading and judging radio frequency tags, in particular to a radio frequency tag position judging system.

In recent years, the demand for big data and cloud computing services has grown rapidly, so the data center has expanded in scale and equipped with more IT equipment to meet such demand. Therefore, the number of assets increases with the increase of equipment, and an effective equipment inventory system is needed to manage equipment assets. Traditional barcodes or two-dimensional codes (QR codes) can only be used within the line of sight, and there is no memory for recording equipment-related information. Therefore, it is gradually replaced by radio frequency tag (RFID) technology, which uses radio waves to exchange information between a reader and a tag. Equipment asset tracking can be divided into two types: mobile asset tracking and static asset tracking. Mobile asset tracking uses fixed readers, usually installed indoors, especially in places such as entrance and exit gantry to track mobile assets. For static asset tracking, the operator brings a handheld reader to the cabinet and reads the static assets in the cabinet. While time-consuming and labor-intensive, the handheld method is a common practice today.

Theoretically speaking, radio frequency tag technology has the possibility of misreading or missing reading, which will affect the accuracy of radio frequency tags and lead to inaccurate equipment inventory. Misreading is when the reader (reader) reads the tag (tag) outside the area, which is an unexpected result of the tag being too sensitive or the radio wave being reflected, diffracted or scattered in the metal environment. In addition, missed reading means that the tags in the area are not read by the reader. They are caused by destructive radio wave interference, tag antenna misalignment, bad tag antenna field pattern, and tag sensitivity. caused by too small or other factors. A common method to improve misreading is to analyze the number of reads (Tag Read Count, TRC) of the radio frequency tag and the strength indicator of the received signal (Received Signal Strength Indicator, RSSI). The number of times, the received signal strength indicator (RSSI) is related to the distance between the tag and the antenna. The improvement of missed reading is achieved by increasing the power of the reader, improving the sensitivity of the tag, or moving the tag from the blind area to the non-blind area.

The purpose of this creation is to provide a radio frequency tag position determination system, which can accurately determine the position of radio frequency tags, solve the inconvenience of manual hand-held readers to read one by one in the previous technology, reduce the probability of misreading and missed reading, and shorten the reading time. Take time to increase the accuracy of inventory equipment.

An embodiment of the radio frequency tag position determining system of the present invention includes a plurality of radio frequency tags, a radio frequency tag reading module, a local computing and storage device, a cloud server and a cloud database. Multiple radio frequency tags are set on multiple objects at different positions. The radio frequency tag reading module includes a reader, at least one antenna electrically connected to the reader, and a transmission power regulator. At least one antenna transmits electromagnetic waves to a plurality of radio frequency tags, and receives the reading data sent by the plurality of radio frequency tags. data and send it to the reader. The local computing and storage device is electrically connected to the reader. The local computing and storage device includes a processing unit and a local database electrically connected to the processing unit. A plurality of read data is transmitted from the reader to the local computing and storage In the device, the local database stores record data of multiple objects. The cloud server is connected to local computing and storage devices via a network. The cloud database is connected to the local computing and storage device and the cloud server through the network. The cloud database stores multiple records of multiple objects, and the multiple records of the local database are synchronized with the multiple records of the cloud database. . The processing unit will read the data and record the data in the local database Performing a comparison, and adjusting the transmitting power of the electromagnetic wave of the antenna according to the comparison result, and sending the comparison result to the cloud server.

In another embodiment, the radio frequency tag reading module includes a plurality of antennas, the plurality of antennas are arranged in a predetermined configuration to form an antenna array, and the configuration of the plurality of antennas corresponds to the configuration of the plurality of objects.

In another embodiment, the plurality of antennas emit electromagnetic waves sequentially in a manner that one antenna emits electromagnetic waves at a time.

In another embodiment, the record data includes the identification information of the item, the reading frequency information of the radio frequency tag, and the intensity information of the electromagnetic wave received by the radio frequency tag.

In another embodiment, a gateway is further included, and the local computing and storage devices are connected to the network through the gateway.

In another embodiment, the local computing and storage device further includes a display unit, and a plurality of read data and comparison results are displayed on the display unit.

10:RF tag

20:RF tag reading module

21: Reader

22: Antenna

23: Transmit power regulator

24: Emission source

30: Local computing and storage device

31: Processing unit

32:Local database

33: Display unit

34: Data analysis module

40: Gateway

50: Cloud server

60:Cloud database

N: network

FIG. 1 is a schematic diagram of a radio frequency tag reading module of a specific example of the radio frequency tag position determination system of the present invention connected with a local computing and storage device to read multiple radio frequency tags.

Fig. 2 is a block diagram of the first embodiment of the radio frequency tag position determination system of the present invention.

Fig. 3 is a block diagram of the second embodiment of the radio frequency tag position determination system of the present invention.

FIG. 4 is a block diagram of a third embodiment of the radio frequency tag position determination system of the present invention.

FIG. 5 is a block diagram of a fourth embodiment of the radio frequency tag position determination system of the present invention.

FIG. 6 is a block diagram of a fifth embodiment of the radio frequency tag position determination system of the present invention.

Fig. 7 is a block diagram of the sixth embodiment of the radio frequency tag position determination system of the present invention.

See Figure 1. Fig. 1 shows a specific example of the radio frequency tag position determination system of the present invention. As shown in Figure 1, in this specific example, at least one radio frequency tag 10 is arranged on an article storage cabinet, and a reader 21 and at least one antenna electrically connected to the reader 21 are arranged on a machine platform 22. A local computing and storage device 30 electrically connected to the reader 21. In this specific example, the number of radio frequency tags 10 is not particularly limited, for example, two or more can be set. The article storage cabinets may be, for example, devices arranged in different places and positions; the number of the article storage cabinets is not particularly limited, for example, there may be at least one, or multiple.

In this specific example, the at least one antenna 22 emits electromagnetic waves to the at least one radio frequency tag 10, and the radio frequency tag 10 is driven by electromagnetic waves; then, the radio frequency tag 10 transmits the stored data to the reader 21, The reader 21 receives and reads the storage data stored in a plurality of radio frequency tags arranged in different locations to become a plurality of read data, and the read data is sent to a local computing and storage device 30. The radio frequency tag reading module 20 , the reader and the local computing and storage device 30 form a communication connection, and the connection method is not limited, for example, it can be connected by wired or wireless transmission.

Also, in this specific example, the radio frequency tag 10 may be a passive radio frequency tag, that is, it generates power after receiving external electromagnetic waves, and transmits the stored data. Each radio frequency tag 10 of this specific example has a plurality of storage data, for example, the related information of itself and described article, for example, the information such as each machine position or setting position of each radio frequency tag 10; Each described article, The type, model, size, item name and other information of the equipment.

Second, please refer to Figure 2 and Figure 3. FIG. 2 and FIG. 3 are block diagrams respectively showing the radio frequency tag position determining system of the first embodiment and the second embodiment of the present invention. In the first embodiment and the second embodiment, the radio frequency tag position determination system of the present invention includes at least a plurality of radio frequency tags 10, a radio frequency tag reading module 20, a local computing and storage device 30, and a cloud server 50 and a cloud database 60; wherein, the radio frequency tag 10 and the radio frequency tag reading module 20 are electrically connected with the local computing and storage device 30, for example, connected by wired or wireless transmission. The local computing and storage device 30 is connected to a network N, and is connected to the cloud server 50 and the cloud database 60 through the network N.

In the first embodiment and the second embodiment, the radio frequency tag reading module 20 includes a reader 21, at least one antenna 22 electrically connected to the reader 21, a transmission power regulator 23 and a transmission source twenty four. According to this invention, at least one antenna 22 emits electromagnetic waves to multiple radio frequency tags 10, and the multiple radio frequency tags 10 are driven by electromagnetic waves to transmit their stored data to the reader 21, and receive the read data transmitted by multiple radio frequency tags 10 and transmit to the reader 21. The transmission source 24 is connected to the antenna 22, and the transmission power regulator 23 is connected to the transmission source 24. The transmission source 24 is fed with an alternating voltage, and the electromagnetic wave is formed through the antenna 22 to transmit to the radio frequency tag 10. The transmission power regulator 23 can adjust the transmission source 24 to feed Input the voltage value or alternating frequency of the antenna 22, thereby changing the power of the electromagnetic wave.

In the first embodiment and the second embodiment, the local computing and storage device 30 is electrically connected to the reader 21, the local computing and storage device 30 includes a processing unit 31, and a local processing unit 31 electrically connected Database32. The local database 32 stores records of multiple objects. A plurality of read data is transmitted from the reader 21 to the local computing and storage device 30 . The processing unit 31 compares the read data with the recorded data in the local database 32 , and determines whether there is an RF tag 10 missed or read incorrectly. .

In addition, in the second embodiment, in addition to having all the components of the above-mentioned first embodiment, the radio frequency tag position determining system of the present invention further includes a gateway 40 . Therefore, in the second embodiment, the local computing and storage device 30 can be further connected to a network N through the gateway 40 , and connected to the cloud server 50 and the cloud database 60 through the network N.

Hereinafter, a third embodiment and a fourth embodiment of the present invention will be described while referring to FIG. 4 and FIG. 5 . As shown in Fig. 4 and Fig. 5, block diagrams of the radio frequency tag position determination systems of the third embodiment and the fourth embodiment of the present invention are respectively shown.

In the third embodiment and the fourth embodiment, the radio frequency tag position determination system of the present invention includes at least a plurality of radio frequency tags 10, a radio frequency tag reading module 20, a local computing and storage device 30, and a cloud server 50, and a cloud database 60; wherein, the radio frequency tag reading module 20 further includes a reader 21, at least one antenna 22 electrically connected with the reader 21, a transmission power regulator 23 and a transmission source 24; Moreover, the local computing and storage device 30 further includes a processing unit 31 and a local database 32 electrically connected to the processing unit 31 .

In the third embodiment and the fourth embodiment, the radio frequency tag 10 and the radio frequency tag reading module 20 are electrically connected to the local computing and storage device 30; the local computing and storage device 30 is electrically connected to the reader 21, and the communication connection In a network N, and connected to the cloud server 50 and the cloud database 60 through the network N. Also, the radiation source 24 is connected to the antenna 22 , and the transmission power adjuster 23 is connected to the radiation source 24 .

In the third embodiment and the fourth embodiment, at least one antenna 22 emits electromagnetic waves to a plurality of radio frequency tags 10, and after the plurality of radio frequency tags 10 are driven by electromagnetic waves, the stored data is transmitted to the reader 21, and the plurality of radio frequency tags receive 10 transmits the read data and transmits to the reader 21. The transmission source 24 is fed with an alternating voltage to form an electromagnetic wave transmitted to the radio frequency tag 10 through the antenna 22. The transmission power regulator 23 can adjust the voltage value or alternating frequency that the transmission source 24 feeds into the antenna 22, thereby changing the power of the electromagnetic wave. Moreover, the local database 32 stores record data of multiple objects. A plurality of read data is transmitted from the reader 21 to the local computing and storage device 30 . Processing unit 31 will read data and local data The records in the warehouse 32 are compared to determine whether there is a radio frequency tag 10 missed or misread.

Moreover, in the fourth embodiment, in addition to having all the components of the above-mentioned first embodiment, the local calculation and storage device 30 in the radio frequency tag position determination system of the present invention further includes a display unit 33 . Therefore, in the fourth embodiment, in addition to being transmitted from the reader 21 to the local computing and storage device 30 as in the first embodiment, the plurality of read data can be further transmitted to the display unit 33 . In addition to comparing the read data with the record data in the local database 32 in the same manner as the first embodiment, the processing unit 31 determines whether there is a missed reading of the radio frequency tag 10 or a misreading of the radio frequency tag 10. Display unit 33.

In addition, in the fourth embodiment, in addition to having all the components of the above-mentioned third embodiment, the radio frequency tag position determining system of the present invention further includes a gateway 40 . Therefore, in the fourth embodiment, the local computing and storage device 30 can be further connected to a network N through the gateway 40 , and connected to the cloud server 50 and the cloud database 60 through the network N.

Next, while referring to FIG. 6 and FIG. 7, the fifth embodiment and the sixth embodiment of the invention will be described. As shown in FIG. 6 and FIG. 7 , they are block diagrams showing the radio frequency tag position determination system of the fifth embodiment and the sixth embodiment of the present invention, respectively.

In the fifth embodiment and the sixth embodiment, the radio frequency tag position determination system of the present invention includes at least a plurality of radio frequency tags 10, a radio frequency tag reading module 20, a local computing and storage device 30, and a cloud server 50 and a cloud database 60; wherein, the radio frequency tag reading module 20 includes a reader 21, at least one antenna 22 electrically connected with the reader 21, a transmission power regulator 23 and a transmission source 24; The local computing and storage device 30 includes a processing unit 31, a local database 32 electrically connected to the processing unit 31, a display unit 33, and a data analysis module 34, the data analysis module 34 can be a program module. In addition, in the sixth embodiment, the radio frequency tag position determining system of the present invention further includes a gateway 40 .

Also, in the fifth embodiment and the sixth embodiment, the radio frequency tag 10 and the radio frequency tag reading module 20 are electrically connected to the local computing and storage device 30; the local computing and storage device 30 is connected to a network through the gateway 40 Road N, and connected to the cloud server 50 and the cloud database 60 via the network N. The transmission source 24 is connected to the antenna 22 , and the transmission power regulator 23 is connected to the transmission source 24 . The local computing and storage device 30 is electrically connected to the reader 21 .

Furthermore, in the fifth embodiment and the sixth embodiment, the local database 32 stores record data of multiple objects. At least one antenna 22 emits electromagnetic waves to a plurality of radio frequency tags 10, and the plurality of radio frequency tags 10 are driven by electromagnetic waves and transmit their storage materials to the reader 21, and receive the read data transmitted by the plurality of radio frequency tags 10 and transmit them to the reader twenty one. The transmission source 24 is fed with an alternating voltage to form an electromagnetic wave transmitted to the radio frequency tag 10 through the antenna 22. The transmission power regulator 23 can adjust the voltage value or alternating frequency that the transmission source 24 feeds into the antenna 22, thereby changing the power of the electromagnetic wave. A plurality of read data is transmitted from the reader 21 to the local computing and storage device 30 and displayed on the display unit 33 . The processing unit 31 compares the read data with the recorded data in the local database 32 to determine whether there is an RF tag 10 missed or misread, and the comparison result is also displayed on the display unit 33 .

In addition, in the fifth embodiment and the sixth embodiment, the data analysis module 34 in the local computing and storage device 30 of the invention can be a program module. Moreover, according to the invention, the data analysis module 34 of the local computing and storage device 30 can use various learning models for learning, so the data analysis module 34 can accurately analyze the received reading data. Again, the applicable model of the data analysis module 34 of the present invention is not particularly limited, for example, Support Vector Machine (Support Vector Machine, SVM), K-Nearest Neighbor (K-Nearest Neighbor) and deep neural network (Deep Neural Network, DNN )wait.

Furthermore, in the sixth embodiment, in addition to having all the components of the above-mentioned fifth embodiment, the radio frequency tag position determining system of the present invention further includes a gateway 40 . Therefore, in the sixth embodiment, the local computing and storage device 30 can be further connected to a network N through the gateway 40 , and connected to the cloud server 50 and the cloud database 60 through the network N.

Hereinafter, the definition of terms, related actions, operation methods, related variations, etc. of the radio frequency tag position determination system of the first, second, third, fourth, fifth, and sixth embodiments of the present invention will be further explained.

The "read data" referred to in this creation includes the identification information of the item, the reading frequency information of the radio frequency tag 10 and the intensity information of the electromagnetic waves received by the radio frequency tag 10 .

The "identification information of the item" referred to in this creation is the same as the storage data of the radio frequency tag 10, which may be the type, model, machine location or setting location information of the equipment.

The "tag read count (TRC) of the radio frequency tag 10" referred to in this creation is the sum of the number of times the radio frequency tag is read by the reader. In space, multiple radio frequency tags can simultaneously read The reader responds, but only the RFID tag that receives the reader's response can carry out subsequent communication. The Received Signal Strength Indicator (RSSI) of the radio frequency tag measures the power of the signal received by the reader. The intensity information of the electromagnetic wave received by the RFID tag indicates the distance between the RFID tag and the reader.

The "reading frequency information of the radio frequency tag 10" in this invention and the "intensity information of the electromagnetic wave received by the radio frequency tag 10" in this invention are established after reading by the reader 21 respectively.

The "record data" referred to in this creation can be, for example, the type, model, machine location or setting location information of the aforementioned equipment, as well as information on the number of times the radio frequency tag 10 was read and the intensity of electromagnetic waves received by the radio frequency tag 10 during the previous detection. Information.

The so-called "missed reading" in this creation means that the recorded data of the local database 32 has the data of a certain radio frequency tag, but the read data does not have the data of the radio frequency tag.

The "misreading" referred to in this creation refers to the reading frequency information of the radio frequency tag 10 in the reading data and the intensity information of the electromagnetic wave received by the radio frequency tag 10, and the reading frequency information of the radio frequency tag 10 in the recording data or the The intensity information of the electromagnetic waves received by the radio frequency tag 10 does not match, which means that the position of the radio frequency tag 10 and the reader 21 are different, and it should be the radio frequency tag 10 that has been read by other devices, or the device corresponding to the radio frequency tag 10 has been used. moved.

Also, according to this creation, the plurality of radio frequency tags 10 in the first, second, third, fourth, fifth, and sixth embodiments can be a plurality of identical or different objects respectively arranged in different places, for example For example, the object can be various equipment such as storage cabinets, storage boxes, warehouses, warehouses, etc., and each radio frequency tag 10 has a plurality of storage data, such as the relevant information of the object it is set on, such as the type of each equipment , model, machine location or setting location information, etc.

Moreover, according to the present invention, the radio frequency tag 10 can be a passive radio frequency tag, that is, it generates power after receiving external electromagnetic waves, and transmits the stored data.

Also, according to this creation, when the read data does not match the recorded data, operate the transmit power regulator 23 of the radio frequency tag reading module 20 to adjust the power of the electromagnetic wave emitted by the antenna 22, for example, adjust the transmit power up or down, Then read the radio frequency tag 10 again to generate read data. Then compare the re-read read data with the record data in the local database 32 . If there is still a situation that does not match, continue to adjust the power of the electromagnetic wave emitted by the antenna 22, and continue to read and compare, until the possible electromagnetic wave power in the adjustment range of the transmission power regulator 23 has been implemented, if there is still reading If the information does not match the recorded information, it means that the object is lost or the location of the movement has not been included in the record.

In the first, second, third, fourth, fifth, and sixth embodiments, the cloud server 50 is connected to the local computing and storage device 30 through a network N. The cloud database 60 is also connected to the local computing and storage device 30 and the cloud server 50 via the network N. The cloud database 60 also stores multiple records of multiple objects, and the multiple records of the local database 32 are synchronized in the cloud A plurality of records of the database 60 . If there is a discrepancy between the read data and the recorded data after continuously adjusting the electromagnetic wave emission power of the antenna 22, the local computing and storage device 30 will send the comparison result and the read data to the cloud server 50 via the network N , and issue a warning.

The state of the object or equipment at the scene is investigated by the personnel entity, and the record data of the cloud database 60 is updated according to the latest state of the object or equipment, while the record data of the local database 32 is shared by the local computing and storage device 30 and the cloud database. 60 connections are also updated synchronously for the next check.

Also, in the first, second, third, fourth, fifth, and sixth embodiments, a plurality of antennas 22 of the radio frequency tag reading module 20 can be arranged in an array, and the configuration of the array of antennas 22 can be Corresponding to the configuration of the object or device, for example, the array configuration of the antenna 22 is vertical to the ground or parallel to the ground or arranged in an arc, which can be changed according to the configuration of the object or device.

According to the present invention, the antennas 22 in the array of antennas 22 have equal distances between them, and the height of the array of antennas 22 is equal to the height of the object or device. The antennas 22 in the array of antennas 22 emit electromagnetic waves sequentially in a manner that one antenna 22 emits electromagnetic waves each time. In this way, the plurality of antennas 22 emit electromagnetic waves at different positions, which can prevent the radio frequency tag 10 from failing to transmit and store data without receiving the electromagnetic waves.

According to the invention, in another embodiment, the antenna 22 can also be configured to be movable, and can move along the predetermined trajectory of the support, and emit electromagnetic waves every time it moves to a certain position, which can also obtain the same effect as the antenna array .

Hereinafter, an application example of the position determination of the radio frequency tag of the present invention will be described. According to the present invention, in an embodiment, firstly, the radio frequency tag information may be established in advance, for example, the information of an object is used to create a radio frequency tag, and the radio frequency tag is set on the object. The information of the object can be the type, model, machine location or setting location information of the aforementioned equipment, etc., the information of the object is stored in the radio frequency tag, and then the radio frequency tag is attached to the corresponding object, such as attached to the device back.

Next, send out electromagnetic waves to the radio frequency tags to drive the radio frequency tags to transmit the stored data to the reader, so as to read the stored data stored in the multiple radio frequency tags arranged on multiple objects at different positions to form multiple read data.

Then, compare whether the multiple reading data are consistent with the record data of multiple objects stored in a local database in advance, and if they are consistent, it means that there is no misreading or missing reading. If the read data does not match the recorded data, it is judged to be a missed reading or a misreading. .

Then, the matching result of the read data and the record data of the local database is sent to a cloud server, so that the record data of the object stored in the local database is synchronized with the record data of the object stored in the cloud database.

Therefore, by using the radio frequency tag position determination system of this invention, it is possible to quickly compare the read data read from the radio frequency tag with the record data in the local database, and then determine whether the position of the radio frequency tag is consistent with the local database Highly reliable judgment results that match the recorded data stored in the

In short, according to the radio frequency tag position determination system of this invention, the position of the radio frequency tag can be accurately determined, which solves the inconvenience of reading one by one by a manual hand-held reader in the prior art, reduces the probability of misreading and missed reading, and shortens the time Excellent effects such as reading time and increasing the accuracy of inventory equipment.

However, the above-mentioned ones are only the preferred embodiments of this creation, and should not limit the scope of implementation of this creation, that is, all simple equivalent changes and Modifications are still within the scope of this creation patent. In addition, any embodiment or patent scope of this creation does not need to achieve all the purposes or advantages or characteristics disclosed in this creation. In addition, the abstract part and the title are only used to assist in the search of patent documents, and are not used to limit the scope of rights of this creation. In addition, the "No. Terms such as "one" and "second" are only used to name elements or to distinguish different embodiments or ranges, and are not used to limit the upper limit or lower limit of the number of elements.

10:RF tag

21: Reader

22: Antenna

30: Local computing and storage device

Claims (10)

A radio frequency tag position determination system, which includes: a plurality of radio frequency tags, which are arranged on multiple objects with different positions; a radio frequency tag reading module, including a reader, at least one antenna electrically connected to the reader and a transmission power adjuster, the at least one antenna transmits electromagnetic waves to the radio frequency tags, and receives the reading data transmitted by the radio frequency tags and transmits them to the reader; a local computing and storage device is electrically connected to the A reader, the local computing and storage device includes a processing unit and a local database electrically connected to the processing unit, the read data is transmitted from the reader to the local computing and storage device, the local data A library stores the recorded data of the objects; a cloud server connected to the local computing and storage device via a network; and a cloud database connected to the local computing and storage device and the cloud server via the network , the cloud database stores the record data of the objects, and the record data of the local database is synchronized with the record data of the cloud database; wherein the processing unit combines the read data with the local data comparing the record data of the library, adjusting the transmitting power of the electromagnetic wave of the at least one antenna according to the comparison result, and sending the comparison result to the cloud server. The radio frequency tag position determining system as described in claim 1, wherein the radio frequency tag reading module further includes a transmitting source. The radio frequency tag position determining system as described in Claim 1, wherein the radio frequency tag reading module includes a plurality of antennas, and the configuration of the antennas corresponds to the configuration of the objects. The radio frequency tag position determining system as described in claim 1, wherein the radio frequency tag reading module includes a plurality of antennas, and the antennas are arranged in a predetermined configuration to form an antenna array. The radio frequency tag position determining system as described in claim 3 or 4, wherein the antennas emit electromagnetic waves sequentially in a manner that one antenna emits electromagnetic waves each time. The radio frequency tag position determination system as described in claim 3 or 4, wherein the antennas are at equal distances from each other. The radio frequency tag position determining system as described in claim 3 or 4, wherein the height of the array of the antennas is equal to the height of the object or equipment. The radio frequency tag position determination system as described in Claim 1, wherein the record data includes an item's identification information, information on the reading times of the radio frequency tag, and information on the intensity of electromagnetic waves received by the radio frequency tag. The radio frequency tag position determining system as described in Claim 1 further includes a gateway, and the local computing and storage device is connected to the network through the gateway. The radio frequency tag position determination system as described in Claim 1, wherein the local computing and storage device further includes a display unit, and the read data and the comparison result are displayed on the display unit.

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